$(document).ready(  
function() {  
	var doc = document, 
	inputs = doc.getElementsByTagName('input'),
	supportPlaceholder = 'placeholder' in doc.createElement('input'),
	placeholder = function(input) {  
		var text = input.getAttribute('placeholder'), defaultValue = input.defaultValue;  
		if (defaultValue == '') {  
			input.value = text;
			input.setAttribute("old_color", input.style.color);  
			input.style.color = "#c0c0c0";  
		}  
		input.onfocus = function() {  
			this.style.color = this.getAttribute("old_color");  
			if (input.value === text) {  
				this.value = ''  
			}  
		};  
		input.onblur = function() {  
			if (input.value === '') {  
				this.style.color = "#c0c0c0";  
				this.value = text  
			}  
		}  
	};  
	if (!supportPlaceholder) {  
		for ( var i = 0, len = inputs.length; i < len; i++) {  
			var input = inputs[i], text = input.getAttribute('placeholder');  
			if (input.type === 'text' && text) {  
				placeholder(input)  
			}  
		}  
	}  
});  